Iet Generation Transmission & Distribution最新文献_第7页

Optimal allocation of energy storage coordinated with thermal power units for ramp events considering the correlation among offshore wind farms

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-21 DOI: 10.1049/gtd2.70003

Xinyi Yu, Xiaoyan Bian, Zhiang Yin, Yi Lin, Yuchen Tang, Fengzhou Sun

{"title":"Optimal allocation of energy storage coordinated with thermal power units for ramp events considering the correlation among offshore wind farms","authors":"Xinyi Yu, Xiaoyan Bian, Zhiang Yin, Yi Lin, Yuchen Tang, Fengzhou Sun","doi":"10.1049/gtd2.70003","DOIUrl":"https://doi.org/10.1049/gtd2.70003","url":null,"abstract":"During extreme meteorological events, the output of wind farms may undergo noticeable fluctuations within short timeframes, leading to wind power ramp events (WPREs), which can result in severe disruptions to the power system, potentially causing widespread outages. However, limited studies have dedicated to addressing the adverse impacts of WPREs on the power system. Moreover, few articles consider the influence of power correlations among multiple wind farms on WPREs. This paper proposes an improved multi-parameter segmentation algorithm for detecting WPREs based on the generation of wind farm output scenarios with different correlation coefficients. And a bi-level optimization model is developed for the allocation of electrochemical energy storage and thermal power units to address offshore WPREs, considering the correlations among wind farms. The effectiveness of the proposed approach is validated through case study based on the modified IEEE RTS-24 node system. Results demonstrate that stronger correlation among wind farms lead to fewer WPREs and lower requirements for thermal power units and electrochemical energy storage capacity, thereby reducing both investment and operational costs.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study and optimization design of steam turbine generator suitable for small-scale lead-bismuth fast reactors

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-21 DOI: 10.1049/gtd2.13361

Peng Cheng, Hongen Zhang, Wenfei Guo, Zhao Wang

{"title":"Study and optimization design of steam turbine generator suitable for small-scale lead-bismuth fast reactors","authors":"Peng Cheng, Hongen Zhang, Wenfei Guo, Zhao Wang","doi":"10.1049/gtd2.13361","DOIUrl":"https://doi.org/10.1049/gtd2.13361","url":null,"abstract":"Compared with traditional reactors, lead-bismuth fast reactors have broader development prospects. Based on the operating characteristics of these reactors, this article proposes a design scheme for steam turbine generators suitable for small-scale lead-bismuth fast reactors. To achieve the design requirements of high efficiency and high-power density for steam turbine generators simultaneously, a multi-objective optimization method based on a feedforward neural network surrogate model is proposed. First, the generator losses and power density are analyzed to obtain the structural parameters that affect the generator optimization objectives. The selected structural parameters are then subjected to sensitivity analysis and data sampling. Subsequently, a feedforward neural network model is used to replace the finite element model, and based on this, a multi-objective genetic algorithm is employed to globally optimize the efficiency and power density of the generator. The final preferred scheme is obtained from the solved Pareto solution set. Meanwhile, the finite element method is used to verify and analyze the optimization results. The optimization results show that while ensuring the generator efficiency, the power density is further improved. Finally, the temperature rise of the generator is analyzed, and the results show that the temperature distribution of the generator is reasonable.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Location of grid forming converters when dealing with multi-class stability problems

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-20 DOI: 10.1049/gtd2.13312

Francisco Fernandes, João Peças Lopes, Carlos Moreira

{"title":"Location of grid forming converters when dealing with multi-class stability problems","authors":"Francisco Fernandes, João Peças Lopes, Carlos Moreira","doi":"10.1049/gtd2.13312","DOIUrl":"https://doi.org/10.1049/gtd2.13312","url":null,"abstract":"This work proposes an innovative methodology for the optimal placement of grid-forming converters (GFM) in converter-dominated grids while accounting for multiple stability classes. A heuristic-based methodology is proposed to solve an optimisation problem whose objective function encompasses up to 4 stability indices obtained through the simulation of a shortlist of disturbances. The proposed methodology was employed in a modified version of the 39-bus test system, using DigSILENT Power Factory as the simulation engine. First, the GFM placement problem is solved individually for the different stability classes to highlight the underlying physical phenomena that explain the optimality of the solutions and evidence the need for a multi-class approach. Second, a multi-class approach that combines the different stability indices through linear scalarisation (weights), using the normalised distance of each index to its limit as a way to define its importance, is adopted. For all the proposed fitness function formulations, the method successfully converged to a balanced solution among the various stability classes, thereby enhancing overall system stability.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13312","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An online loop closing current calculation method for complex distribution networks considering source and load uncertainties

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-15 DOI: 10.1049/gtd2.13359

Weifeng Peng, Licheng Sha, Kaiyuan Zheng, Shufeng Dong, Xin Zhang, Jing Tian

{"title":"An online loop closing current calculation method for complex distribution networks considering source and load uncertainties","authors":"Weifeng Peng, Licheng Sha, Kaiyuan Zheng, Shufeng Dong, Xin Zhang, Jing Tian","doi":"10.1049/gtd2.13359","DOIUrl":"https://doi.org/10.1049/gtd2.13359","url":null,"abstract":"To address the challenges posed by frequent source and load fluctuations in existing loop closing current calculation methods, this paper proposes an online loop closing current calculation method that considers source and load uncertainties. First, a dual-stack dynamic monitoring system is utilized to obtain real-time voltage and current variations before and after disturbances. Second, Thevenin's theorem is employed to build an equivalent model of the distribution network, simplifying the complex network into a combination of an independent voltage source and a series impedance. Then, the steady-state loop closing current is calculated based on the open-circuit voltage and equivalent impedance at both sides of the loop closing point. Next, the optimal frequency method is applied to determine the equivalent impedance and attenuation time constant at a specific frequency, achieving accurate calculation of the transient loop closing current. Finally, simulations are conducted to model the fluctuations in distributed generation and load, analysing the steady-state and transient loop closing currents. The simulation results demonstrate that the proposed method accurately captures the effects of source and load fluctuations on the loop closing current in dynamic environments, with minimal calculation error, indicating its high practicality.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13359","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143115253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced constant extinction angle control for subsequent commutation failure in LCC-HVDC

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-12 DOI: 10.1049/gtd2.13356

Hao Li, Xiaohua Li, Benjun Ge, Xiaoyu Sun

{"title":"Enhanced constant extinction angle control for subsequent commutation failure in LCC-HVDC","authors":"Hao Li, Xiaohua Li, Benjun Ge, Xiaoyu Sun","doi":"10.1049/gtd2.13356","DOIUrl":"https://doi.org/10.1049/gtd2.13356","url":null,"abstract":"To mitigate subsequent commutation failure (SCF) in line-commutated converter-based high-voltage direct current transmission systems, the response and limitations of the control system are analysed. The results reveal that due to the prolonged negative deviation of the extinction angle during recovery, the integral output of the proportional–integral controller in constant extinction angle (CEA) significantly reduces the advanced firing angle order, even below normal operating angle. This directly leads to a delayed transition between control strategies and diminishes the effectiveness of CEA. Furthermore, the influence of fault severity, fault type, and AC system strength on SCF is examined. Based on these findings, an enhanced CEA control method to suppress SCF is proposed. By setting an expected firing angle and adaptively adjusting the integral parameter, the control strategy switching moment can be advanced, improving the CEA's control margin and enhancing capability. Moreover, introducing a notch filter reduces firing angle fluctuations and strengthens CEA's ability to suppress SCF. Finally, the theoretical analysis and the effectiveness of the proposed optimization method are validated.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13356","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative distribution network design using GAN-based distributionally robust optimization for DG planning

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-09 DOI: 10.1049/gtd2.13350

Peijin Li, Yichen Shen, Yitong Shang, Mohannad Alhazmi

{"title":"Innovative distribution network design using GAN-based distributionally robust optimization for DG planning","authors":"Peijin Li, Yichen Shen, Yitong Shang, Mohannad Alhazmi","doi":"10.1049/gtd2.13350","DOIUrl":"https://doi.org/10.1049/gtd2.13350","url":null,"abstract":"The integration of renewable energy sources and the increasing demand for reliable power have posed significant challenges in the design and operation of distribution networks under uncertain conditions. The inherent variability in renewable energy generation and fluctuating consumer load demand requires advanced strategies for Distributed Energy Resources (DERs) allocation and sizing to enhance grid resilience and operational efficiency. This article introduces an innovative framework for optimizing distribution network design under these uncertainties. The approach integrates deep learning-assisted Distributionally Robust Optimization (DRO) with Generative Adversarial Networks (GANs) to dynamically model and manage the inherent variability in renewable sources and demand fluctuations. Employing a combination of nonlinear optimization techniques and advanced statistical methods, the framework robustly optimizes network configurations to minimize losses and improve voltage stability. The model's efficacy is rigorously tested on the IEEE 33-bus system, achieving a 15% reduction in power distribution losses and a 20% improvement in voltage stability compared to traditional models. Utilizing open-source computational tools, the method not only boosts operational reliability and efficiency but also adapts effectively to the increasing integration of volatile renewable energy sources. These results underscore the framework's potential as a scalable and robust solution for modern power network design challenges.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13350","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of grid-forming inverters on distance protection

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-08 DOI: 10.1049/gtd2.13354

Henrik Johansson, Qianli Xing, Nathaniel Taylor, Xiongfei Wang

{"title":"Impacts of grid-forming inverters on distance protection","authors":"Henrik Johansson, Qianli Xing, Nathaniel Taylor, Xiongfei Wang","doi":"10.1049/gtd2.13354","DOIUrl":"https://doi.org/10.1049/gtd2.13354","url":null,"abstract":"Grid-forming (GFM) inverters are anticipated to play an essential role in facilitating the integration of renewable energy in bulk power systems. The fault response of GFM inverters and its impact on traditional protection schemes are ongoing research topics. Distance protection is today one of the most commonly applied protection schemes and depends on multiple system preconditions for reliable operation—many of which may no longer hold in systems with a high penetration of inverters. This paper investigates the impacts of GFM inverters on distance protection, with the main objective of providing an improved understanding of the topic. Important interoperability issues are highlighted with simulation results and elaborated upon based on the theory behind the distance relay model and the behaviours of GFM inverters during faults. The simulations consider numerous fault types and two GFM inverters with different current-limiting control techniques in their fault-ride through strategies. Results indicate several challenges that state-of-the-art distance relays may face with GFM inverters.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13354","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collaborative optimization method for scalable prosumers’ participation in frequency regulation ancillary services

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-08 DOI: 10.1049/gtd2.13358

Xi'an Pan, Xin Ai, Fei Gao, Junjie Hu, Yingnan Zhang

{"title":"Collaborative optimization method for scalable prosumers’ participation in frequency regulation ancillary services","authors":"Xi'an Pan, Xin Ai, Fei Gao, Junjie Hu, Yingnan Zhang","doi":"10.1049/gtd2.13358","DOIUrl":"https://doi.org/10.1049/gtd2.13358","url":null,"abstract":"As the demand for frequency regulation resources in power systems increases, collaborative optimization of flexible resources with rapid frequency regulation response capabilities, particularly by enabling scalable prosumers in local areas to participate in the frequency regulation ancillary service market, can effectively enhance safety, stability, and frequency regulation ability of power system. Therefore, this paper first establishes a collaborative optimization framework for scalable prosumers in frequency regulation and describes the operation model of prosumers. Considering the uncertainties that can impact prosumers' power decisions during frequency regulation, a scenario-augmented dataset generation method based on a denoising diffusion probabilistic model is proposed to improve decision adaptability under extreme scenarios with insufficient regulation capabilities. Additionally, to enhance the scalability and applicability of the training method in scalable prosumer collaborative optimization scenarios, a multi-agent attention proximal policy optimization algorithm combined with a global attention mechanism is introduced. The effectiveness of the proposed method in improving decision timeliness, operation benefits, scalability, and policy adaptability during scalable prosumers’ participation in frequency regulation ancillary services is validated using the IEEE standard node test system under various scales and scenarios.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13358","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physics-informed anomaly and fault detection for wind energy systems using deep CNN and adaptive elite PSO-XGBoost

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-02 DOI: 10.1049/gtd2.13289

Chun-Yao Lee, Edu Daryl C. Maceren

{"title":"Physics-informed anomaly and fault detection for wind energy systems using deep CNN and adaptive elite PSO-XGBoost","authors":"Chun-Yao Lee, Edu Daryl C. Maceren","doi":"10.1049/gtd2.13289","DOIUrl":"https://doi.org/10.1049/gtd2.13289","url":null,"abstract":"Wind energy systems require fault diagnosis that identifies faults despite data inconsistencies. This study addresses challenges in supervisory control and data acquisition (SCADA) systems for monitoring wind turbine conditions from imbalanced data representation and error vulnerability. It examines the efficacy of adaptive elite-particle swarm optimization (AEPSO)-tuned extreme gradient boosting (XGBoost) on an imbalanced SCADA dataset for wind turbine fault classification. The methodology integrates the resampled dataset with t-distributed stochastic neighbour embedding represented deep learning features. Employing AEPSO-XGBoost classifier trained on merged SCADA and deep learning data from a physics-informed deep convolutional neural network forms the basis of the fault (alarm) classification model. The AEPSO-XGBoost regressor is validated across three distinct rear bearing temperature datasets, facilitating parameter optimization and model robustness. Also, this study explores supervised and unsupervised anomaly detection models using PDCNN and AEPSO-XGBoost with rear-bearing temperature data. Findings exhibit substantial fault classification and prediction enhancements by merging resampled SCADA data with deep learning features. Moreover, results show that applying AEPSO-XGBoost can significantly improve anomaly detection metrics. Through AEPSO-XGBoost's efficacy in enhancing fault prediction within imbalanced SCADA datasets, the study proposes an integrated framework for fault classification and anomaly detection as an innovative predictive maintenance system for wind energy systems.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability analysis of an observer-based nonlinear model predictive controller for resonant grounded power distribution systems

IF 2 4区工程技术

Iet Generation Transmission & Distribution Pub Date : 2025-01-02 DOI: 10.1049/gtd2.13355

Warnakulasuriya Sonal Prashenajith Fernando, Md Apel Mahmud, Shama Naz Islam

{"title":"Stability analysis of an observer-based nonlinear model predictive controller for resonant grounded power distribution systems","authors":"Warnakulasuriya Sonal Prashenajith Fernando, Md Apel Mahmud, Shama Naz Islam","doi":"10.1049/gtd2.13355","DOIUrl":"https://doi.org/10.1049/gtd2.13355","url":null,"abstract":"This article presents the stability analysis of a resonant grounded power distribution system (RGPDS) in which a nonlinear model predictive controller (NMPC) with a nonlinear extended state observer (NLESO) is used to achieve the desired fault current compensation through the residual current compensation (RCC) inverters. The detailed model of the system is developed to appropriately model nonlinearities so that these can be represented as an extended state and estimated using the ESO. The closed-loop model of the system is developed in the discrete-time to conduct the frequency-domain analysis using two different methods, for example, the describing function (DF) method and Tsypkin criterion. The main target of these analyses is to gain useful insights on different control parameters and get an idea about their effects on the overall stability of the RGPDS with an REFCL. The relationship between the Nyquist plot and the trajectory of the key control parameter is used to determine the boundary up to which the control parameter can be adjusted to maintain the stability of the system. Finally, it is identified that the Tsypkin criterion allows more flexibilities compared to the DF method for selecting the control parameter.","PeriodicalId":13261,"journal":{"name":"Iet Generation Transmission & Distribution","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/gtd2.13355","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0